MCQ on Structure and Union in c

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❤️ TOP 500+ C Programming Question and Answer

C programming is the basic language of programming that help to learn another language. So this MCQ is very useful for you.

C is a general purpose ,high level language that originally developed by Dennis Ritchie to develop the UNIX operating system at Bell labs.

 

Q.1 Structure is —- data type.

A) Predefine
B) User Define
C) Cant’t be say
D) None

ANSWER= (B) User Define

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Q.2 Structure members are access using — operator.

A) dot
B) assignment
C) logical
D) None

ANSWER= (A) dot

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Q.3 Union is a ?

A) Primitive data type
B) User define data type
C) Both A & B
D) 8

ANSWER= (B) User define data type

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Q.4 A C Structure or User defined data type is also called

A) Secondary data type
B) Derived data type
C) Both A & B
D) None

ANSWER= (C) Both A & B

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Q.5 Find out the output for the following program

  void main()
  {
  struct man
  {
  int c;
  }
  struct man man1;
  man1.c=4;
  printf(“Child=%d”,man1.c);
  }

A) Child
B) Child=0
C) Child=4
D) Compiler Error

ANSWER= (C) Child=4

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Q.6 —- Allows to combine data items of different kinds ?

A) Array
B) Function
C) Structure
D) None

ANSWER= (C) Structure

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Q.7 The restrictions with union is ?

A) The last member can be initialized
B) The first member can be initialized
C) Any member can be initialized
D) None

ANSWER= (B) The first member can be initialized

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Q.8 Which of the following operation is illegal in structures?r to that structure ?

A) Pointer to a variable of the same structure
B) Typecasting of structure
C) Dynamic allocation of memory for structure
D) None

ANSWER= (B) Typecasting of structure

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Q.9 Which of the following uses structure ?

A) Array of structure
B) Linked list
C) Binary tree
D) All of these

ANSWER= (D) All of these

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Q.10 Number of bytes in memory taken by the below structure is ?

  struct test
  {
  int a;
  char b;
  };

A) Multiple of word size
B) integer size + character size
C) cant’t be say
D) None

ANSWER= (B) integer size + character size

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Q.11 In a structure operator . is called as ?

A) period operator
B) dot operator
C) Both A & B
D) None

ANSWER= (C) Both A & B

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Q.12 A structure is used is used to when we wish to store ?

A) Dissimilar
B) Similar
C) identical
D) None

ANSWER= (A) Dissimilar

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Q.13 Identify the correct statement ?

A) union can be member of structure
B) Structure can be member of union
C) Both A & B
D) None

ANSWER= (C) Both A & B

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Q.14 Which of the following can not be a structure member ?

A) Array
B) Function
C) Structure
D) None

ANSWER= (B) Function

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Q.15 Find out the output for the following program

  void main()
  {
  struct stock
  {
  int items;
 char name[10];
  }
 a;
  strcpy(a.name,”computer”);
 a.items=525
  printf(“Name=%s items=%d”,a.name,a.items);
  }

A) Compiler Error
B) Garbage value
C) Name=computer items=525
D) None

ANSWER= (C) Name=computer items=525

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Q.16 structure is a ?

A) collection of elements that can be of same data type
B) Elements of a structure are called members
C) collection of elements that can be of different data type
D) All of these

ANSWER= (D) All of these

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Q.17 To access the members of a structure using a pointer to that structure,you must use the —- operator

A) &
B) *
C) ::
D) ->

ANSWER= (D) ->

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Q.18 Which operator connects the structure name to its member name ?

A) –
B) .
C) &
D) *

ANSWER= (B) .

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Q.19 Which of the following are themselves a collection of different data types?

A) String
B) Structure
C) Char
D) int

ANSWER= (B) Structure

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Q.20 How many bytes will be consume memory of given union ?

  union student
  {
  int rollno;
 char name[40];
  float marks;
  }
  std[12];

A) 40
B) 12
C) 480
D) 28

ANSWER= (C) 480

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